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perlancar

NAME

Perinci::CmdLine::Lite - A lightweight Rinci/Riap-based command-line application framework

VERSION

This document describes version 1.24 of Perinci::CmdLine::Lite (from Perl distribution Perinci-CmdLine-Lite), released on 2015-07-28.

SYNOPSIS

In gen-random-num script:

 use Perinci::CmdLine::Lite;

 our %SPEC;

 $SPEC{gen_random_num} = {
     v => 1.1,
     summary => 'Generate some random numbers',
     args => {
         count => {
             summary => 'How many numbers to generate',
             schema => ['int*' => min=>0],
             default => 1,
             cmdline_aliases=>{n=>{}},
             req => 1,
             pos => 0,
         },
         min => {
             summary => 'Lower limit of random number',
             schema => 'float*',
             default => 0,
         },
         max => {
             summary => 'Upper limit of random number',
             schema => 'float*',
             default => 1,
         },
     },
     result_naked => 1,
 };
 sub gen_random_num {
     my %args = @_;

     my @res;
     for (1..$args{count}) {
         push @res, $args{min} + rand()*($args{max}-$args{min});
     }
     \@res;
 }

 Perinci::CmdLine::Lite->new(url => '/main/gen_random_num')->run;

Run your script:

 % ./gen-random-num
 0.999473691060306

 % ./gen-random-num --min 1 --max 10 5
 1.27390166158969
 1.69077475473679
 8.97748327778684
 5.86943773494068
 8.34341298182493

JSON output support out of the box:

 % ./gen-random-num -n3 --json
 [200,"OK (envelope added by Perinci::Access::Lite)",[0.257073684902029,0.393782991540746,0.848740540017513],{}]

Automatic help message:

 % ./gen-random-num -h
 gen-random-num - Generate some random numbers

 Usage:
   gen-random-num --help (or -h, -?)
   gen-random-num --version (or -v)
   gen-random-num [options] [count]
 Options:
   --config-path=s     Set path to configuration file
   --config-profile=s  Set configuration profile to use
   --count=i, -n       How many numbers to generate (=arg[0]) [1]
   --format=s          Choose output format, e.g. json, text [undef]
   --help, -h, -?      Display this help message
   --json              Set output format to json
   --max=f             Upper limit of random number [1]
   --min=f             Lower limit of random number [0]
   --naked-res         When outputing as JSON, strip result envelope [0]
   --no-config         Do not use any configuration file
   --version, -v

Automatic configuration file support:

 % cat ~/gen-random-num.conf
 count=5
 max=0.01

 % ./gen-random-num
 0.00105268954838724
 0.00701443611501844
 0.0021247476506154
 0.00813872824513005
 0.00752832346491306

Automatic tab completion support:

 % complete -C gen-random-num gen-random-num
 % gen-random-num --mi<tab>

See the manual for details on other available features (subcommands, automatic formatting of data structures, automatic schema validation, dry-run mode, automatic POD generation, remote function support, automatic CLI generation, automatic --version, automatic HTTP API, undo/transactions, configurable output format, logging, progress bar, colors/Unicode, and more).

DESCRIPTION

Perinci::CmdLine is a command-line application framework. It allows you to create full-featured CLI applications easily and quickly.

See Perinci::CmdLine::Manual for more details.

There is also a blog post series on Perinci::CmdLine tutorial: https://perlancar.wordpress.com/category/pericmd-tut/

Perinci::CmdLine::Lite is the default backend implementation. You normally should use Perinci::CmdLine::Any instead to be able to switch backend on the fly.

REQUEST KEYS

All those supported by Perinci::CmdLine::Base, plus:

ATTRIBUTES

All the attributes of Perinci::CmdLine::Base, plus:

log => bool (default: from env or 0)

Whether to enable logging. This currently means setting up Log::Any::Adapter to display logging (set in hook_after_parse_argv, so tab completion skips this step). To produce log, you use Log::Any in your code.

The default is off. If you set LOG=1 or LOG_LEVEL or TRACE/DEBUG/VERBOSE/QUIET, then the default will be on. It defaults to off if you set LOG=0 or LOG_LEVEL=off.

log_level => str (default: from env, or 'warning')

Set default log level. The default can also be set via LOG_LEVEL/TRACE/DEBUG/VERBOSE/QUIET.

validate_args => bool (default: 1)

METHODS

All the methods of Perinci::CmdLine::Base, plus:

ENVIRONMENT

All the environment variables that Perinci::CmdLine::Base supports, plus:

DEBUG

Set log level to 'debug'.

VERBOSE

Set log level to 'info'.

QUIET

Set log level to 'error'.

TRACE

Set log level to 'trace'.

LOG_LEVEL

Set log level.

PROGRESS => BOOL

Explicitly turn the progress bar on/off.

FORMAT_PRETTY_TABLE_COLUMN_ORDERS => array (json)

Set the default of table_column_orders in format_options in result metadata, similar to what's implemented in Perinci::Result::Format and Data::Format::Pretty::Console.

RESULT METADATA

All those supported by Perinci::CmdLine::Base, plus:

x.hint.result_binary => bool

If set to true, then when formatting to text formats, this class won't print any newline to keep the data being printed unmodified.

SEE ALSO

Perinci::CmdLine::Any, Perinci::CmdLine::Classic

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Perinci-CmdLine-Lite.

SOURCE

Source repository is at https://github.com/sharyanto/perl-Perinci-CmdLine-Lite.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Perinci-CmdLine-Lite

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2015 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.